Signaling device



July 2, 1929. w, SPARKS 1.719.789

SIGNALING DEVICE Filed Aug. 18, 1921 Fig] i vl 1/0 u MEW' ill) Patented July 2, 1929.

UNITED STATES PATENT OFFICE.

'WILLAM SPARKS, OF JACKSONQMIGHIGAN, ASSIGNOR TO THE SPARKS-WITHINGTON COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

SIGNALING- DEVICE.

An'pleation filed August 18, 1921. Serial No. 493,498.

This invention relates to certain new and useful in'iprovenients in signaling' devices, and is closely related to lny co-pending applie-ation, Serial No. 396,802, tiled July 16, 1920.

rlhe niain objeet of the inventionl is the production oit a signaling` devine oit the luotor driven type, in which accurate adjustuient to a substantially predetermined extent in readily niade, either to conuj ensate "tor wear or to ell'ect the desired positioningl of the diupliragnractuating nieniber with reference to the diaphragm to produce such vibration. oit the latter as will result in the pro duction oit a satisfactory signal for the purpose at hand.

Another object is the production olf a signaling' device having the adjustment advantages above described, in whieh the parts are normally so held in any position of adjustinent as to prevent attling' ot the saine under (n dinary conditions oit use.

Other objects and advantages relate to the details oli consti'uctioln itorin and arrangenient ol the said parts by which the above set forth objects are 'attaineth all. as will more fully appear lron'i the ifolloiafinp,l descripthin, taken in, connection. with the accompanying drawiiunx, in which:

Figure vl is a longitudinal section through a device of niy invention.

fligure 2 is a rear end elevation of the saine, with the cover removed.

l1 igrure 3 is a 'fragmentary view showing the corrugated strap.

Figure Ll is a sectional view on line fluit, Figure 3.

Figure 5 is a View similar to Figure l.

or i. ,le reeention oi? he ieetive resonator threaded end portions -5-- and -6- ol a Un shaped inotor case or yoke --7-, the nuts 81m engaging' the threaded ends oil the ease -7- to rigidly connect the saine to the rear diaphragm ease section `The motor ease 47- carries the usual pole pieces il, field coils -l(l-, and eeniniutator brushes 1l-4. The armature l2- o the motor is mounted upon the armature shalt -l3-, which shal't has one end extending' through the `rear Wall "-14- ot the niotor ease, and its opposite end extending through. and journaled in the rear diaphragm case section at `The armature shattcarries at a point forward of `theta-se section -ll-, a caln or toothed ineinber ml5- adapted to contact with a projection -lupon the central portion ot the diaphragm to effect vibration of the latter upon rotation oit the cani. The cani may be held upon the armature sha'lt in any suitable Way, as by nieans olf a nut -l7-.

The brushes -l 1- are adapted to contact with eolnrnutator 19-M upon the armature shaft.

For the purpose ot elleeting' desired adjustniei'it o'l the armature shaitt, to vary the relativo position o't the cain l5-- and the projection-16- upon the diaphragm to produce the desired vibration of the latter,` l have provided an end thrust bearing eolisisting' ot a bar 20 extending` substantially parallel with the rear wall `1Ll- ,of the U-shaped lnotor shell, and havingr one end -Qlbent at substantially right angles to the body of the bar and 'formed with a reduced portion -lljlthrough an openingr in the rear Wall 14 so as to slide therein, but liinit movenieut in the direetionot length oil' the bar. Preilerahly, as "shown, the bar QO- o'li channel torni and has one ott its ends toi-ined with ,i a depresfied portion flS- adapted to receive and retain one end ot a spring; -22 n positioned between the free end ot the bar and the rear wall `lLl---. Preferably the sprint;

is disposed ou the omiosite side oit the shalt tends` thro ugrh the Wall lll- Intermediate the springiand theflanged the shaft M13 bears a st the bar towards the wall -14- I have provided a threaded stud -23- adapted to have an adjustable threaded engagement with the rear wall -lfirand extend through the bar -20-. This stud comprises an enlarged head portion -24- preferably provided with a slot for the reception of rotating means."

Y In order to effectpredetermined tine degrees of adjustment I have provided a strap 26- which extends across the bar 20- and has its ends -27- and .-28-- bent at substantially right angles to its laterally7 extending portion so as to lie in substantial contact With the edges ofthe bar -20. The upper portion of this'strap, or adjusting member, is provided with a series of radially extending grooves or notches -40- adapted to conform ,withand receive a series of projections -30- upon the lower face of the enlarged head -24- of stud 2B- By forming these receiving grooves and projecting parts Vof desired size, any predetermined quantity of adjustment may be effected by moving the stud 23- through a single notch or additional notches should further adjustmentbe desired.

Further, Ythis interlocking engagement of the parts holds them rigidly in any predeterminedhposition of adjustment. In order to `prevent forward movement of shaft P- and to holdit in comparatively rigid posi tion to preventrattling during use, I have provided a lspring member -B1- as shown in the form of elongated plate, having an intermediate bend, one end of which spring barrer plate is mounted on the threaded end 5H ofthe motor eas-e at the rear of the butt -'-8-,the opposite end of said bar contacting with thefrontend of the armature shaft :-13, the spring bar being soV tensioned as to exert a thrust force upon the said shaft, tending to holditin contact with the bar -2O--` at the rear of the case.`

Preferably, as shown, the rear wall lliof the case is provided with a recess -3Q- for receiving the inner end of the spring -22-, the souter end of which surrounds the boss 18-. v j

n kIt will be .understood from the above description that very accurate adjustment can be made by this struct-ure, and the parts can be rigidlyheldrin any predetermined lposition of adjustment without rattling, and that the adjustment iseffected easily and eiiicient- Vly uponthe exterior of the cup-shaped case S5- through which the head 2dof the stud --23-,- is adapted to project as best shown in Figure 1.

Although'l have shown and described Va specific construction as illustrative of a per-V haps preferred embodiment of my invention,

I do notA desireto limit myself to the-details of construct-ion of theV same, as various changes and modifications may be made without departing from the invention as set forth in the appended claims.

I claim:

1. An apparatus of the character described. comprising a diaphragm having a nar-piece thereon, an armature shaft presented end wise toward the diaphragm and having a rotor upon its forward end for contact with said wear-piece, a case in which the rear portion of said armature shaft is journaled, a rigid ycross-bar at the rear of the case and having a portion bearing against but unconnected to the adjacent end of the armature shaft, spring means urging said shaft into contact with said cross-bar and a stud extending through said. cross liar and having a threaded engagement with said case for adjusting said crossbar toward the case.

2. An apparatus of the character described comprising a diaphragm having a wear-piece thereon, an armature shaft presented endwise toward the diaphragm and having a rotor upon its forward end for contact with said wear-piece, a case section in which the rear portion of said armature shaft is journaled, a rigid cross-bar at the rear of the case section and having a portion bearing against but un connected to the adjacent end of the. armature shaft, spring means urging said shaft into lcontact with said cross-bar and a stud en*- gaging the cross-bar at one side of the armature shaft and adjustable with respect to the case section for adjusting the said cross-bar toward the case-section to thereby adjust the armature shaft and rotor with respect to said wear-piece.

3. An apparatus of the character described comprising` a diaphragm having a near-piece thereon, an armature sha t't presented endwise toward the diaphragm and having a rotor upon its forward end for Contact with said wear-piece, a case-section in which the rear portion of said armature shaft is journaled, a rigid cross-bar at the rear of the case-section and lia-ving a portion bearing against but unconnected to the adjacent end of the arma ture shaft, spring means urging said shaft into contact with said cross-bar, a stud engaging the cross-bar at one side of the armature sha tft and adjustablewith respect to the case-sect ion for adjusting the said cross-bar toward the case-section to thereby adjust the armature shaft and rotor with respect to said wearpiece, and a casing enclosing the case-section, and havingl an opening through which the end of said stud extends to permit adjustment of said cross-bar without removing the casing.

it. AAn apparatus of the character described comprising a. diaphragm having a wear-piece thereon, an armature shaft presented endwise toward the diaphragm and having a rotor upon its forward end for contact with said wear-piece, a case-section in which the rear portion of said armature shaft is joui-nailed, a rigid cross-bar at the rear of the case-section and having a portion bearing against but unconnected to the adjacent end of the armature shaft, spring nieans urging said shaft into contact with said cross-bar, a stud engaging the cross-bar at one side of the armature shaft and adjustable with respect to the case-section for adjusting the said cross-bar toward the case-section to thereby adjust the arnurture shaft and rotor with. respect to said weanpiece, a casing enclosing the case-section, and having an opening through which the end of said stud extends to permit adjustnient of said cross-bar Without removing the casing, and additional means connected to the cross-bar and engaging the case section for guiding the cross-bar in its movement toward the case-section.

5. The combination with a cross Wall provided with a pair of openings, of a shaft jour-V naied in one of said openings, a cross bar eZ-tending substantiall",7 parallel with the cross wall and having a flange positioned in the other opening in the cross wall, means for moving said cross bar towards the cross Wall to position said shaft, and spring means tending to nieve said cross bar away from the cross wall. p

` 6. In a structure of the character described, a ci se section, a U-shaped case secured to said case section, a shaft journalod in said. case section and the rear Wall of the U-shaped case, a rigid cross-bar at the rear of the U-shaped case having a portion in contact with but unconnected to the adjacent end of the motor shaft, a headed stud engaging said cross bar at one side of said shaft and having an adjustable relation with the U-shaped ease, and a cover extending over the U-shaped case and having an opening through which the head of said stud is exposed.

7. An apparatus of the character described comprising a diaphragm having a Wear-piece thereon., an arniature shaft presented endwise toward the diaphragm and having a rotor lupon its forward end for contact with said nar-piece, a case in which the rear portion of said armature shaft is journaled, a crossbar at the rear ofthe ease and having a portion bearing against the adjacent end of the armature shaft, a .stud extending through said cross bar and having a threaded engagement with said case for adjusting said crossbar toward the case, and additional means for spacing the crossbar from t-he case.

8. An apparatus of the character described, cmrujn-ising a diaphragm having a. Wearpiece thereon, an armatureshaft, a rotor mounted on the front end of said armature shaft for engagernel'it with said Wear-piece, a case sec* tion inwhich the rear portion of said ar1nature shaft is journaled, and meansfor adjusting' said armature shaft toward the diaphragm to vary the overlap of said rotor en said Wear-piece comprising a cross bar at the rear of `the section, and. having a portion contacting with the rear end of the armature shaft, and a flanged portion engagediwith the case section, a threaded me1n ber extending through the cross-bar at one side of the armature shaft and having a threaded engagement with the case section, and a spring disposed upon the opposite side of the armature shaft from said member and positioned between the case section and the cross bar.

9. In an end thrust bearing for shafts, a cross wall., a sha-ft journaleiil in said erosswall, said cross-wall provided 'with an opening, a crosssbar extending substantially parallel with said cross wall and havingl a flanged portion positioned in said opening, a stud engaging said cross-bar upon one side of one shaft and having an adjustable engagement with said cross-wall, and spring means upon the opposite side of said shaft disposed bctween the cr( svvall and the crossbar for spacing the cross bar from the cross Wall.

10. ln an end thrust bearing for shafts, a cl'ossavall, a shaft journaled in said crosswall, .said cross-Wall provided with an open ing, a cross-bar extending substantially parallel with sai d cross-wall. and having a :lian ged portion positioned in said opening, a stud engaging said cross-bar upon one side of one shaft and having an adjustable engagemei'it with said cross-wall, spring means upon the opposite side of said shaft disposed between the cross-Wall and the crosebar for spacing the cross bar from the cross Wall, and a resilient' member for normally holding said inen'iber in contact with said erossbar.

ll. An apparatus of the character `described comprising a diaphragm having a wear-piece thereon, an armature shaft, a rotor mounted on the front end of said armature shaft for engagement with said wearpiece, a case section in which the rear por tion of said armature shaft is jouriulled, means for adjusting said armature shaft toward the diaphragm to vary 'the over-lap of said. rotor on said wcarqiicce comin'ising a cross bar at the rear of the ease section and having a portion contact-ing with the rear end of the armature shaft, and a flanged portion enga-ged with the case section, a threaded member extending through the cross-bar at one side ot the armature shaft and having a threaded. engagement with. the case section, a spring disposed upon the opposite side of the armature shaft from said member and positioned. between the case section and the cross bar, and a casing enclosing the case section and having an opening through wliich. the end of said threaded member extends.

12. An apparatus of the character described comprising a diaphragm having a wear-piece thereon, an armature shaft, a rotor mounted on the front end of said armature shaft for engagement with said weer1n piece, a ease section in which the rear pruftinn lll) ofsaidl armature shaft is journaled, means for adjusting said armature shaft toward the diaphragm to vary the over-lap of said rotor on said wear-piece comprising a cross-bar at the rear of the case section and having a portion contacting with the rear end of the armature shaft, and a flanged portion engaged with the case section, a threaded member extending through the cross-bar at one side of the armature shaft and having a threaded engagement with the case section, a spring .disposed upon the opposite side of the armascribed comprising a case part, a diaphragm having a wear-piece thereon, a rotary armature shaft presented. endwi'se toward the diaphragm and journaled in said case part and having a rotor upon its forward end for engagement with said wear-piece, a rigid .cross-bar at the rear of the case part and having one end connected to the case part at one side of the armature shaft in a manner to prevent endwise movement of said bar and having its opposite end extending across the armature shaft atthe rear end thereof and unconnected to said shaft, spring means urging said shaft rearwardly, and a rotary screw member extending through said cross bar` and rotatable with respectito the crossbai'for adjusting said shaft endwise to vary the overlap of said rotor upon said wearpieee upon rotation of said screw member.

1li. A, structure of the character described comprising a shaft, an end-thrust bearing for the shaft comprisinga rotatable member and va toothed surface carried by said member, means vengaging the said toothed surface for frictionally locking'the rotatable member in any position of adjustment while permitting astep by step adjustment of a predetermined amount,- and a casing enclosing said elements and having an opening through which the endof the rotatable member extends, and

. permitting .adjustment of said shaft without removingthe casing.

15. AA structurev of the character described comprising a case part7 a shaft ournaled in said case part', an end thrust bearing for the shaft comprising a rotatable member haring an adjustable engagement with said case Y part, a toothed surface carried by said member, Vand means engagingV the toothed surface for frictionally holding the rotatable memberin any position of adjustment, but permitting a step by step adjustment of a predetermined amount, and a casing enclosing said elements and having an opening. through which the rotatable member extends and permitting adjustment of sai d shaft without re moving the casing.

1G. An apparatus of the character described comprising a diaphragm having a wear-piece thereon, an armature sha ft, a rotor mounted on the front end of said armature shaft for engagement with said wearpiece, a case section in which the rear portion of said armature shaft is jourualed, means for adjusting said armature sha ft toward the diaphragm to vary the over-lap ot said rotor on said wear-piece comprising a rotai'able member having a toothed -surface rotating with said member, und means en gaging the said toothed surface for frictionally locking the rotatable member in any position of adjustment while permitting a step-by-step adjustment ol a predetermined amount to thereby vary the over-lap of said cam upon said wear-piece.

17. An apparatus of the character described comprising a diaphragm having a wear-piece thereon, an armature shaft, a. rotor mounted on the front end of said armature shal't for engagement with said wearpiece, a case section in which the rear pol'- tion of said armature shaft is journalcd, means for adjusting said armature shaft toward the diaphragm to vary the over-lap of said rotor on said wear-piece comprising a rotatable member having a toothed surface rotating with said member, and means engaging the said toothed surface for fric tionally locking the rotatable, member in any position of adjustment while permitting a step-by-step adjustment of a predetermined amount to thereby vary the over-lap o l" said cam upon said wear-piece.7 and a casing cnclosing the said case section and having an opening through which the end of the rotatable member extends to thereby permit adjustment of said shaft without removing the casing.

` 18.1111 apparatus of the character described comprising a. diaphragm having a wear-piece thereon, an armature sha l't, a rotor mounted on the front end of said arma ture shaft. for engagement with said wearwith the case section, a spring disposed upon llt) eil)

the opposite side of lthe armature shaft from Said ineinbei` and positioned between the ease section and the Cross-bar, a easing eilelosing the Caee section and having an opening through which the end oli said threaded ineinber extends, Said threaded ineinber having a toothed sin'taee, ineans interlockingl with said toothed sini-tace for trietionally holdingl the threaded ineinber in anj7 predeter- .inined position while pern'iitting a step-by step adj nstinent for faiinnel the overlap of said earn upon said wear-piene, and means engaging' the 0nd ot the shalt between the cani and the diaphragm 'tor reeiliently ho`lding;l said shaft in Contact 'with said eroSsbar.

19. An apparat-ne et the eharaeter described comprising a diaphragm haring; a waar-piece thereon, an arinatnre shaft, a rotor inonnted on the trent end of said arznatnre shaft 'lior engagement with said Wearpieoe, a ease aeetion :in which the rear portion oit said armature shatt ie jol'irnaled, ineane ttor adjusting said armature sha'tt to Ward the diaphragggni to vary the over-lap of said rotor on said weaiepieee coinprisinzg,- a rotatable lneniber having a toothed snrltaee rotating,1 With said member, means engaging; the said toothed surface iter frietionally locking); the rotatable member in any position `ot adjnetinent while perinittiiig a steplijf-step adjustment oit a predeterinined anionnt to thereby vary the over-lap o'lf said eain 'upon Said Wear-piece, and means engaging the end ot the shaft between the rain and the diaphragm for resiliently holding' said .shaft in Contact with Said Gross-bar.

@0.15m apparatus of the eharaeter described Comprising,r a diaphragm having` a wearpieee thereon, an arn'iatnre Shaft presented endwise 'tiiward the diaphragm and havingl a rotor npon its forward end `lor eontaet with said Wear-pieee, a transvin'seiy extending ease-portion having; a bearing in `which the rear portion oit said. shaft is jonrnaled, and through which the rear portion ol' said shaft extends, a rigid orossbar at the rear of said transverse ease portion, Said bar having' a portion engaged with the ease portion at one side oit said shattand ann other portion exteiiding` across the end ot the shatt and Vuneonneeted to the shait't, adj nstable screw .means eng-aging the said (arosebar and adapted to eii'eet endnfise adj ust inent olf Said sha't't with respect to the oase Vaction to vary, the overdap of the rotor 1 ipon said wearjpiiere, spring nioans lirgringr said shalt rearwznt ease portion and eresia-bar and having an opening through whioh a portion of the adjustable .screw n'ieans extends to permit adjustment ot said ,shaft by rotation ot said screw means Without .remoting.;l the casina'.

52,1. A signal, ini-.hidinga diaphrL i, means iter mounting,l the sesame, a drivingl shaitt, a diapliiragireacti:ating ineehaniani, one of the `elemente thereof being` secured to said :'Jhafl't and another to said diaphragm, a 'trainethrough which said shatt extends, a rigid bar located elidabiy at the rear oit Said, traine and providingl an nnyielding endthrnst bearing; 'tor said shatt, and a lneinber :nljnstably eonneeting the bar and traine to Vary the degree oil Cooperation oit the parts et the diaphragm-aetuating mechanism.

22. A signal, including,y a diaphragm, means tor nnnintingi' the same, a driving` shaft, a diaphragln-aetnating mechanism, one of the elements thereot being secured to said shaft and another to said diaphragm, a traine through which said shai't extends, a bar priwiding,l a bearingI l'or said shatt, a nieinber adjnetably connecting the bar and .trame 'to vary the degree of eooperatioi'i oli' the parts of the diapliragni-aetnating :lneehanisin., and means adj aeent said nieinber and eeopeirating with said bar to retain the latn ter in proper engagement with. said nient ber.

In Witness Whereoil I have hereunto my hand this 30th day of July, 1921.

WILLIAM SPARKS.

ly and a easing enclosing' the" 

